CVE-2026-27369
Deserialization Object Injection in BoldThemes Celeste
Publication date: 2026-03-05
Last updated on: 2026-03-09
Assigner: Patchstack
Description
Description
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| boldthemes | celeste | to 1.3.6 (inc) |
Helpful Resources
Exploitability
| CWE ID | Description |
|---|---|
| CWE-502 | The product deserializes untrusted data without sufficiently ensuring that the resulting data will be valid. |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
CVE-2026-27369 is a PHP Object Injection vulnerability found in the WordPress Celeste Theme versions up to and including 1.3.6. It allows unauthenticated attackers to inject malicious PHP objects into the application by exploiting the deserialization of untrusted data. This can lead to severe security issues if the attacker can use a suitable Property Oriented Programming (POP) chain.
How can this vulnerability impact me? :
This vulnerability can have serious impacts including the possibility for attackers to execute arbitrary code, perform SQL injection, conduct path traversal attacks, cause denial of service, and other exploits. Since it requires no authentication, attackers can exploit it remotely, potentially compromising the entire website or server.
How does this vulnerability affect compliance with common standards and regulations (like GDPR, HIPAA)?:
I don't know
How can this vulnerability be detected on my network or system? Can you suggest some commands?
There is no specific detection method or commands provided in the available information to identify this vulnerability on your network or system.
What immediate steps should I take to mitigate this vulnerability?
Since no official patch is available for this vulnerability as of the publication date, immediate mitigation involves applying the mitigation rule issued by Patchstack to block attacks targeting this flaw.
Website owners should proactively implement this mitigation to protect their sites from exploitation.
Monitoring for updates and applying an official patch once released is also recommended.